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cpufreq/amd-pstate: Fix setting EPP in performance mode

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EPP 0 is the only supported value in the performance policy.
commit 798c47593c ("cpufreq/amd-pstate: Add support for platform profile
class") changed this while adding platform profile support to the
dynamic EPP feature, but this actually wasn't necessary since platform
profile writes disable manual EPP writes.

Restore allowing writing EPP of 0 when in performance mode.

Reviewed-by: Marco Scardovi <scardracs@disroot.org>
Tested-by: Marco Scardovi <scardracs@disroot.org>
Reported-by: Stuart Meckle <stuartmeckle@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221473
Closes: https://gitlab.freedesktop.org/upower/power-profiles-daemon/-/work_items/190
Fixes: 798c47593c ("cpufreq/amd-pstate: Add support for platform profile class")
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
This commit is contained in:
Mario Limonciello (AMD) 2026-05-30 17:04:34 +02:00 • committed by Mario Limonciello
commit 5629eec1a2
1 changed files with 1 additions and 1 deletions
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2
drivers/cpufreq/amd-pstate.c
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@ -1428,7 +1428,7 @@ ssize_t store_energy_performance_preference(struct cpufreq_policy *policy,
epp = cpudata->epp_default_dc;
}
if (cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) {
if (epp > 0 && cpudata->policy == CPUFREQ_POLICY_PERFORMANCE) {
pr_debug("EPP cannot be set under performance policy\n");
return -EBUSY;
}